Magnetic separator.



E. S. BENNETT. MAGNETIC SBPABTORi APPLIUATION rum] Mn 2, 1910l PatentedAug. 8,1m.

UNITED STATES PATENT OFFICE.

ERASTUS S. BENNETT, OF NEW YORK, N. Y.

MAGNETIC SEPARATOR.

To all whom it may concern:

Be it known that I, EnAs'rUs S. BENNETT, citizen of the United States,residing at New York, N. Y., have invented certain new and usefulImprovements in Magnetic Separators, of which the following is aspecification.

My invention relates to magnetic separators, and it consists in thcfeatures of conn struction and combination and arrangement of partshereinafter described and particularly pointed out in the appended.claims.

In the accompanying drawings Figure 1 is a side elevation of a magneticseparator embodying my invention; Fig. 2 is a cross sectional view ofFig. 1.

In these drawings, l is a hollow shaft mounted in suitable bearings onthe frame or tank 2, said Shaft carrying a coil magnet 3 which isinclosed by side plates 4, 5, bolted together at 6, and having inwardlyentending flanges 7 with packing material at 8 l ing between saidflanges and clamped tllereby to make a watertight joint. The

separator belt is shown at 9 moving in the direction of the arrows, andbearing upon particles to collect at this point.

the eriphery of the clamping plates 4 and 5. his belt carries off themagnetic particles which are held thereto by the action of the magnet,it being understood that the magnet is partly submerged in the watercontained in the tank, which water has therein the materials to beseparated. Suit- -able jets are provided at 10 to project the materialagainst the lower side of the belt as it passes aroundV the magnetssubmerged in the water of the tank. While the strongest magnetic pull ison the face of the magnets between the flanges 7 there is also astrongmagnetic field existing at the sides of the magnet, which euses themagnetic Further, the magnetic action on the separated material lying onthe belt at the point where this belt leaves the magnets is such as totend to hold the material at this point and to allow the belt to passunder the said material, and thus fail to remove and convey it to thepoint of delivery. Furthermore, there is more or less of the mateiialwhich drops or spills over the lateral edges of the belt, and themagnetic particles are attracted to the peripheral face of the magnetsor the casingsinclosing the same, which face is exposed directl beneaththe point where the belt leaves t e magnets, and this Specification ofLetters Patent.

Application led May 2, 1910.

vacross the same and at regular intervals.

Patented Aug. 8, 1911.

serial No. 558,976.

material will thus collect on the face of the rotary magnetic body, sothat it will be carried under the belt and around between the belt andthe adjacent surface of the magnetic body, receiving constant additionsfrom the material dropping over the edge of the belt. Again some of thedropping material will fall onto `the upper side of the return portionof the belt, and will thus collect between the belt and the face of themagnetic body. The belt also has a tendency to slip laterally,especially when wet, and if there is any considerable material betweenit and the face of the magnet. My present improvements are designed toremedy these conditions. For this purpose I provide on each side of themagnet body o a-'frame 11, this being shown as of substantiallytriangular form, but as to this I do not limit myself, the said framecarrying on its inner face a scroll-shaped blade or scraper 12 extendingfrom near the centralshaft of the magnetic body gradually outward, andterminating at the point 13 adjacent and slightly above the plane of thebelt near the point where the said belt leaves the magnetic body. Theseframes are held together by cross bolts 14, and they are secured to theframe of the tank by bolts 15 passing through slots to permit adjustmentof the frames on the tank or the bearing plates 16 fixed thereto. Theseframes also support an apron 17 which extends beneath the upper art ofthe belt, and covers the portion of tlie magnetic body whichwouldotherwise be exposed between the upper and low'er portions of ,thebelt where they leave and return to the surface of the magnetic body.This apron has its side portions curving or inclining downward y fromthe vertical center line of the belt, so that any material falling fromthe beltvwill be deflected laterally and will be prevented from lodginon the exposed periphery of the magnetic body between the upper and thelower portions of the belt.. This will prevent the collection of any ofthe magnet-ic particles between the face of the magnetic body and thebelt.

In order to force theseparating material to leave the magnetic body andfollow the movement of the belt, I provide ribs 1S on the outer face ofthe beltextending laterallyf I these ribs or projections are made ofiron'- or magnetic material, they are made in sections of which thecenter piece is of4 non-magnectic material. `The lower or return portionof the belt is directed into proper relation with the peripheryy of themagnetic body by a wheel '19 suitably mounted in a bracket 20 supportedon the tank or trame, the said wheel being deeply flanged at both sidesto prevent lateral oisplacement of the belt. A jet of water or a brushmay be employedl at 21 to clear the returnportion of the belt of anyparticles Vor material which otherwise would be carried by the belt backonto the periphery of the magnet, and get between the said magnet andthe belt. The saidframes 11, together with the scroll 12, may be cast inone piece or made separately and fastened together, but in any case theyshould be of nonmagnetic material, as should also the cross bolts 14,the apron 17, and the hollow shaft, together with the supports 16 and,in fact, all parts excepting magnet. All of these parts being ofnonmagnetic' material, the magnetic particles will be attracted by themagnet only.

The action of Athe scraper 12 will be readily understood, it serving todetach any magnetic particles from the lateral face of the magneticbody, and to crowd these particles upwardly to the point .where theupper ortion of the belt leaves the magnetic body.

o far as the relation of the particles to the lines of force isconcerned, the said particles are, as it were, in the air, the scraperactin simply to crowd them tothe periphery an over onto the belt. Thatportion of the scroll scraper which extends, beyond the up er part ofthe belt and the ribs thereon is Bent slightly inwardly to deliver theparticles scraped from the lateral face' of the magnetic body onto thebelt as near the center thereof as practicable asishown in dotted linesat X, Fig. 2. f i

The tank may be of an amalgamating character, such as disclosed by me inprevious patents, or any other vessel or sluice in which there aremagnetic particles to be separated. The apron 17 may extend to acomparatively sharp ',edge at its central upper portion. Thenon-magnetic scroll need not actually touch the sides of the magnet,though set close thereto.

I do not limit myself tothe details of con struction above described.

I claim as my. invention 1. In combination in a magnetic ore separator,a. rotary magnetic body, means for removing the separated lparticles,and a scraper or the lateral face of the magnetic body, said scraperbeing in the form of a scroll extending from near the center of the sideface outwardly toward the periphery of the magnetic body, substantiallyas described.

9.. In combination in a magnetic ore sepa# rator, a rotary magneticbody, a belt passing around the same and a scraper of scroll Vformextendin along the lateral face of themagnetic bofy and terminatingadjacent the belt, substantially as described.

3. In combination En a magnetic ore separator, a rotaryymagnetic body,means for conveying the separated particles from said magnetic body, anda scraper adjacent the lateral face of the magnetlo body and terminatingadjacent the conveying means and adapted to deliver the scraped pa.:ticles thereto, substantially as described.

4. In combination in a magnetic ore separator, a rotary magnetic body, aconveyer for removing the separated particles therefrom, and a scraperadjacent the lateral face of the magnetic body and having its endoverlying the conveying means to deliver the material thereto,substantially `as described.

5. In combination in a may -etic ore separator, a rotary magnetic bo u.a belt passin around the same, and a Hector or shield Iextending overthe expoed ortionl of the periphery of the magnetic b y between theoutgoing and return portions of the belt, substantially as described.

6. In combination in a magnetic ore separator, a rotary magnetic bod abelt passing around the same, anda de ector or shiel extending over theexposed ortion of the periphery ofthe magnetic bo y between the out oingand return portions of the belt,

' sai shield or delector inclinin'g from a substantially central pointlaterally in both directions to deliver the material off to the side ofthe magnet-ic body, substantially as described.

In testimony whereof, l' allix my 'signature-in presence of twowitnesses.

ERASTUS S. BENNETT.

Witnesses:

JOHN J. DAvIDsoN, MYRoN L. JUs'rrN.

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